XmlIgnore Property

XmlAttributes::XmlIgnore Property

 

Gets or sets a value that specifies whether or not the XmlSerializer serializes a public field or public read/write property.

Namespace:   System.Xml.Serialization
Assembly:  System.Xml (in System.Xml.dll)

public:
property bool XmlIgnore {
	bool get();
	void set(bool value);
}

Property Value

Type: System::Boolean

true if the XmlSerializer must not serialize the field or property; otherwise, false.

By default, all public fields and public read/write properties are serialized by the XmlSerializer. That is, the value of each public field or property is persisted as an XML element or XML attribute in an XML-document instance.

To override the default serialization of a field or property, create an XmlAttributes object, and set its XmlIgnore property to true. Add the object to an XmlAttributeOverrides object and specify the type of the object that contains the field or property to ignore, and the name of the field or property to ignore.

If an XmlIgnoreAttribute is applied to a field or property, the field or property is ignored. However you can override that behavior by creating an XmlAttributes object, setting its XmlIgnore property to false, adding it to an XmlAttributeOverrides object specifying the type of the object that contains the field or property, and the name of the field or property.

The following example serializes a class named Group, which contains a member named Comment to which the XmlIgnoreAttribute is applied. The example creates an XmlAttributes object, and sets the XmlIgnore property to false, thereby overriding the XmlIgnoreAttribute.

#using <System.Xml.dll>
#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml::Serialization;

// This is the class that will be serialized. 
public ref class Group
{
public:

   // The GroupName value will be serialized--unless it's overridden.
   String^ GroupName;

   /* This field will be ignored when serialized--
      unless it's overridden. */

   [XmlIgnoreAttribute]
   String^ Comment;
};


// Return an XmlSerializer used for overriding.
XmlSerializer^ CreateOverrider()
{
   // Create the XmlAttributeOverrides and XmlAttributes objects.
   XmlAttributeOverrides^ xOver = gcnew XmlAttributeOverrides;
   XmlAttributes^ attrs = gcnew XmlAttributes;

   /* Setting XmlIgnore to false overrides the XmlIgnoreAttribute
      applied to the Comment field. Thus it will be serialized.*/
   attrs->XmlIgnore = false;
   xOver->Add( Group::typeid, "Comment", attrs );

   /* Use the XmlIgnore to instruct the XmlSerializer to ignore
      the GroupName instead. */
   attrs = gcnew XmlAttributes;
   attrs->XmlIgnore = true;
   xOver->Add( Group::typeid, "GroupName", attrs );
   XmlSerializer^ xSer = gcnew XmlSerializer( Group::typeid,xOver );
   return xSer;
}

void SerializeObject( String^ filename )
{
   // Create an XmlSerializer instance.
   XmlSerializer^ xSer = CreateOverrider();

   // Create the object to serialize and set its properties.
   Group^ myGroup = gcnew Group;
   myGroup->GroupName = ".NET";
   myGroup->Comment = "My Comment...";

   // Writing the file requires a TextWriter.
   TextWriter^ writer = gcnew StreamWriter( filename );

   // Serialize the object and close the TextWriter.
   xSer->Serialize( writer, myGroup );
   writer->Close();
}

int main()
{
   SerializeObject( "IgnoreXml.xml" );
}

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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